Star · M4V
WISEA J180839.55+070021.7
WISEA J180839.55+070021.7 is a main-sequence star of spectral type M4V in the constellation Ophiuchus, 241.4 light-years from the Sun.
| Constellation | Ophiuchus |
|---|---|
| Distance | 241.4 light-years (74.0 pc) |
| Apparent magnitude | magnitude 21.63 |
| Absolute magnitude | magnitude 17.28 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.92 × 10⁻⁴ L☉ |
| Radius | 0.0521 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 18h 08m 39.7s |
| Declination (J2000) | +7° 00′ 24″ |
| Space velocity (relative to the Sun) | 113.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.63. Visible from the whole Northern Hemisphere and south to latitude 83° S. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1785. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.3 million years.
The Sun seen from there
From a planet around WISEA J180839.55+070021.7, the Sun would look like a star of magnitude 9.18, in the direction where our sky has the constellation Monoceros. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 87860 15.1 light-years
- 71 Oph 19.1 light-years
- HIP 90036 19.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.